A simple white-light fiber-optic interferometric sensing system for absolute position measurement

An absolute position-sensing system based on a white-light spectrum modulation in a very simple fiber-optic interferometer is presented. The channelled spectrum, captured by a commercial spectrometer, is analyzed using the algorithm based on fitting the calculated autocorrelation function of the cap...

Full description

Saved in:
Bibliographic Details
Published in:Optics and lasers in engineering 2010-04, Vol.48 (4), p.486-490
Main Author: MANOJLOVIC, Lazo M
Format: Article
Language:English
Subjects:
Absolute position measurement
Autocorrelation functions
Channelled spectrum
Exact sciences and technology
Fiber optics
Fiber-optic sensor
Fundamental areas of phenomenology (including applications)
Gaussian
General equipment and techniques
Instruments, apparatus, components and techniques common to several branches of physics and astronomy
Interferometers
Lasers
Mathematical analysis
Modulation
Optical fibers
Optical instruments, equipment and techniques
Optics
Physics
Position measurement
Sensors (chemical, optical, electrical, movement, gas, etc.)
remote sensing
Sensors, gyros
White-light interferometry
Citations: Items that this one cites
Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:An absolute position-sensing system based on a white-light spectrum modulation in a very simple fiber-optic interferometer is presented. The channelled spectrum, captured by a commercial spectrometer, is analyzed using the algorithm based on fitting the calculated autocorrelation function of the captured optical power spectrum with the sum of two Gaussian functions. The absolute position is obtained directly from the separation between two fitted Gaussian functions. The system currently provides unambiguous measurement over a range of 200 μm with a minimal error of better than 6 nm.
ISSN:0143-8166
1873-0302
DOI:10.1016/j.optlaseng.2009.08.008